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Symptoms:

  • Clutch failure
  • Low line pressure
  • High line pressure
  • Soft shifts
  • Harsh shifts

Cause:

Continuous oscillation of the pressure regulator valve causes valve body bore wear, resulting in line pressure irregularities and valve instability.

Correction:

The Sonnax pressure regulator valve kit combines a sleeved balance spool to eliminate the wear preventing proper valve stroke, and a modified pressure regulator valve with lengthened spools to increase sealing contact and provide greater stability

A4CF1, A4CF2

Oversized Pressure Regulator Valve Kit
Part No. 84741-03K


You need this if... View Instructions

Continuous oscillation of the pressure regulator valve in Hyundai/Kia vehicles with A4CF1, A4CF2 transmissions cause valve body bore wear, resulting in line pressure irregularities and valve instability. The Sonnax pressure regulator valve kit 84741-03K fixes these issues by combining a sleeved balance spool to eliminate the wear preventing proper valve stroke, and a modified pressure regulator valve with lengthened spools to increase sealing contact and provide greater stability.

  • The balance sleeve and valve assembly eliminates wear to allow proper stroking of the valve, has lengthened bore engagement for greater sealing integrity, and is made from wear-resistant materials for durability
  • The pressure regulator valve has lengthened spools at critical locations to increase sealing contact for better pressure regulation and valve stability
  • A new spring is included to restore OE pressure specifications and work with the lengthened pressure regulator valve
  • Balance Sleeve
  • Balance Valve
  • Retaining Clip
  • O-Rings (2) 1 extra
  • Pressure Regulator Valve
  • Spring

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Hyundai/Kia A4CF1, A4CF2 Valve Body Layout

Hyundkia a4cf1 vbl
  • 84741 03k combo
  • 84741 03k

You need this if...

A vacuum test at the ports indicated holds 18 in-Hg or more. If poor vacuum results are discovered at the OE pressure regulator valve, Sonnax PR valve kit [84741-01K] should be installed.

  • 84741 03k test